Coffee-mill.



J. F. CARSON.

COFFEE MILL.

APPLICATION F1150 SEPT. 11, 1914.

Patented May 23, 1916.

gD4 srarns "PATENT onirica.

JESSE F. CARSON, OF CLEVELAND, OHIO,ASS1IGNOR TO y"IHECLEVELAND ELECTRIC AND lVIl-LCl-IINEEV MANUFACTURING COMPANY, A CQRIORATION 0F OHIO.

' COFFEE-MILL.

Specification of Letters Patent.

Application filed September 11, 1914. Serial N o. 861,173.

To all wlw/m, t mayl concern Be it known that I, Jnssn F. CARSON, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain ynew and useful Improvement in Coffee-Mills, of which the following is afull, clear, and exact description.

This invention relates to a mill construe` tion, which is more particularly intended for the breaking and grinding'of coffee beans. i

The object of the invention is to provide a construction, which will effect a simple and easily accomplished adjustment of the grindingI burs, with respect tok each other for the purpose of effecting various degrees of fineness to which the coee beans are to be ground, and further provide a convenient, quick way vto clean the burs, and further to provide a construction permitting easy access to the interior of the mill.

Generally speaking, the invention provides the elements and combination thereof set forth in the accompanying claims.

Reference should be had to the accompanying drawings forming a part of this specication, in `which- Figure l is a vertical, transverse section through a portion of the coffee mill, and Fig. 2 is a front elevation of a portion of the coffee mill. i

. At 1 there is represented a casing within which are housed the grinding burs.A The driven bur which is represented at 2 is mounted upon a shaft 4, which is suitably mounted in a bearing indicated at 5 in the wall of the casing. This shaft may be turned in any desired manner, and for the purpose I have indicated at 6 a motor by which the shaft 4 may be driven. The casing is provided in the front wall with a substantially circular opening which may be represented at 7. As a cover for the opening 7, there is a plate 8, which is `secured upon the casingin any desired manner, asy by means of screws 8a indicated in Fig. 2. This plate is provided with an upwardly extending spout y9,which.is adapted to receive a receptacle indicated at '10,' in which the coffee to be ground may be poured. The spout 9 has an inwardly extending portion represented at 9a, which extends to discharge coffee adjacent the grinding surfaces of the burs.

Closing the principle involved I have embodied.` it in the following construction: Upon the interior wall of plate 8 is an inwardly extending cylindrical flange 11. Upon the interior surface of this flange 11, threads are cutwhich are indicated at 12. The bur 13 sets within flange 11, and is provided with threads upon its exterior surface which are indicated at 14, the threads 12 and 14 being of proper pitch to coperate with` each other. The bur 13 has a central opening into which extends the lower extending portion 9a of the spout 9, so that coffee passing through the spout 9 is introduced directly to the engaging surfaces of the burs. Turning movement imparted to the bur 13 will, by virtue of the screw thread engagement with the flange 12, cause the bur 13l -to move either toward or from the burf2. The turning of the bur 13 is accomplished upon the outside of the casing 1 means ofv a pin 15, which is secured to bur 13, and extends to the inside of the casing through a slot 16. which is formed in the plate 8. This `slot is concentric with the center of the bur.

For holding the pin 15 in an adjusted position, I have provided upon the outside of the plate 8 an arc Istrip 17, which is provided with notches 18 at various points in its length. Surrounding the pin 15 is a sleeve-19, and within the sleeve is a spring 2.0 which bears against the head 15a of the pin 15. This spring at its lower end bears against a shoulder 19a of the sleeve 19. It will be apparent that the action of the spring is normally to push the sleeve 19 against the plate 17. The end of the sleeve 19 is provided with an extension indicated at 22, which is adjusted to fit and engage with the various notches 18 formed in the plate 17. I have shown live sets of notches, but it will be apparent that more notches may be provided to effect different positions of the bur 13 where such is desired. .A

The coffee which haspassed between thel burs 2 and 13 finds exit throughy the outlet 23. u com?.

L easy of access for purposes of repair or other purposes. s.

The ease` and readiness .with which the burs may be moved toward Vand fromeach other, renders the burs practically self clean*- pieces of iron or stone, passes with the coffee beans to the burs, lit is not necessary to take the mill apart, but simplyjto move the pinrlv so as to open the distance between the burs whereupon the foreign substance will vdrop through, subsequently the pin. 15y may be moved to return the burs to theirlor-iginal position. j

Details Vof constructiony may be fvaried trom` what has heretofore been described without departing from the spirit of this invention.

I-'laving thus" described my invention,

vwhat, I claim is:

l. In a coffee millconstruction, combination with a casing, av cylindrical flange eX- tending from one wall of said casing, and a bur mounted within the said flange, means for turning the said bur, there being a central opening inthe opposite wallof said casing, a plate having a 'flange extending into the opening on the wall of said casing, a normally stationary bur mounted within the said flange, a charging spout mounted upon said plate, said plate being adapted to be secured to the casing whereby the charging spout extendsv within the opening ofthe normally stationary bur. f

2. In a coffee millconst'ruction', combina-.- tion witha casing, a pair of oppositely dis# posed burs located within'said casing, means for turning one of said burs, the 'other of said burs having a screw threaded engage'- ment with its mounting, a plate having an arcuate slot therein which is vcoaxially ar ranged with respect to the burs, a pin secured to the bur having the screw threaded engagement and extending through 'the slot in the plate, whereby the bur having screw threaded `engagement may be" moved to ef- Gopies of this'patenyt may tef obtained for fect ustinent between the grinding faces of the bur, and means for securing saidpin inl-an adjusted position in the said slot.

3. In a coffee mill construction, combination with a casing, oppositelyv disposed burs within the casing, means for turning one of said burs, the other of said burs being provided with a central opening, the saidbur with the central opening being provided with a lspiral screw thread upon a portionv thereof, a plate having a portion provided with a spiral thread which engages with the thread, upon the bur, a charging spout carried by'said plate, and having a portion which, when the plate is in position upon y f the casing, extends into the opening formed lng, for if some foreign substance, such as in'one of the Vvsaid burs, the said plate 'being provided with an arcuate slot, which-is cylindrical with respectto the axis of the burs,

`one side thereof, a bur supported in said casing, a plate to cover the opening in said casing, a bur carried by said plate, said bur being adjustably mounted in said plateand whenthe plate is in position, adapted to operate with the other bur, v'said bur lupon the plate being adaptableto vary the distance between the grinding faces of the burs,rsaid plate and bur being .removable as a unit .and meansfor turning one of said burs.

' 5. Ina coffee'millv construction, combinavtionwith a casing, having an opening in one side thereof, abur supported in said casing, a plate adapted to cover the opening in the said casing, a bur carried by the said plate, said bur having a v central opening, a delivery spout carried by the plate having an extension which extends intothe opening of the said bur, said plate yand theparts carried thereby being removable as a unit and means for turning .one of said burs.v`

In ytestimony whereof, I hereunto affix my signature in thefpresence vof two wit-y IleSSQS.

Witnesses: 4

J. HUDSON, i' L. I. PORTER.

JEssE ncAnsoN.- A 

